1994460551 has 2 divisors, whose sum is σ = 1994460552. Its totient is φ = 1994460550.

The previous prime is 1994460491. The next prime is 1994460577. The reversal of 1994460551 is 1550644991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1994460551 - 2¹⁰ = 1994459527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994460581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997230275 + 997230276.

It is an arithmetic number, because the mean of its divisors is an integer number (997230276).

Almost surely, 2^1994460551 is an apocalyptic number.

1994460551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994460551 is an equidigital number, since it uses as much as digits as its factorization.

1994460551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1994460551 is about 44659.3836836112. The cubic root of 1994460551 is about 1258.7567629143.

The spelling of 1994460551 in words is "one billion, nine hundred ninety-four million, four hundred sixty thousand, five hundred fifty-one".